The Veterans Administration uses Tyvek envelopes to mail prescriptions out
to veterans in them. The stuff isn't commercial grade Tyvek and I have
seen mailings of prescriptions come to me in varying conditions, mostly safe
and good, but a few worn for the wear and travel from Cincinnati, or St.
Louis. If anyone wants a sample of one of these envelopes I'll be glad to
send it along to you some that you might play around with it. Just send me
an address.
Personally though, like Peter, a nice 80lb or heavier paper is more to my
liking.
Just another Tyvek Tale to consider before using the stuff.
Nothing's perfect, or permanent just remember that; and entropy claims most
all things on this earth, so why fight it?
John
-----Original Message-----
From: Book_Arts-L [mailto:BOOK_ARTS-L@xxxxxxxxxxxxxxxx] On Behalf Of Peter
Verheyen
Sent: Tuesday, April 07, 2009 8:47 AM
To: BOOK_ARTS-L@xxxxxxxxxxxxxxxx
Subject: Re: [BKARTS] Throw up and Tyvek
Let's try this again...
I have some concerns about the use of Tyvek in some of the more stressful
applications. Primarily this centers on Tyvek splitting internally. What I
had thought using it for was as a replacement for the paper connecting strip
(usually and 80lb text paper like dove gray/Mohawk/...) on vellum bindings.
What I found was that the vellum stuck great but that with flexing at the
hinge tended to split internally, not tear, creating hollow spots. This can
also seen simply be folding Tyvek back on itself and rolling... Note, this
was using USPS Priority Mail envelopes... In the end I found that I got
better results using paper. Had not tested with different kinds, but just
might.
That said, I have seen Tyvek applied well for many conservation purposes.
One just needs to know their materials and how they are used/react.
p.
_____________________________________
Peter D. Verheyen
Bookbinder & Conservator, PA - AIC
<verheyen@xxxxxxxxxxxxxxx>
The Book Arts Web & Book_Arts-L Listserv
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